Q - Dividend income portfolio with $100k investment for retiring parent

Hmm, perhaps you can consider Syfe REIT+. It's a roboadvisor portfolio but dividend oriented through REITs. Their dividend yield for the past year and the year before was 5.7% and 5.2% if I recall correctly, which is pretty decent considering the dividend slashes due to Covid-19.

You can supplement this with high quality companies that pay out a respectable dividend (our banks are a decent pick). This allows your portfolio to be slightly diverisified from REIT-based risks as well.